1. Division of Anaesthesia and Intensive Care Medicine, Perioperative Services Landspitali ‐ The National University Hospital of Iceland Reykjavik Iceland
2. Faculty of Medicine University of Iceland Reykjavik Iceland
3. Heilsuklasinn Neurology Clinic Reykjavik Iceland
4. Geriatric and Rehabilitation Services Landspitali ‐ The National University Hospital of Iceland Reykjavik Iceland